Ansatsu Kyoushitsu: episode:0 Deai no Jikan

A special episode of the Ansatsu Kyoushitsu TV series was shown at Jump Festa 2014 and later added as a bonus feature in the first Blu-ray and DVD volume. It features Koro-sensei reflecting on his initial encounter with Karasuma, which involved conflict and disagreement before mutual respect developed. Karasuma later clarifies that their real meeting was much less dramatic.